/*********************************************************************************
*  Copyright (c) 2010-2011, Elliott Cooper-Balis
*                             Paul Rosenfeld
*                             Bruce Jacob
*                             University of Maryland 
*                             dramninjas [at] gmail [dot] com
*  All rights reserved.
*  
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions are met:
*  
*     * Redistributions of source code must retain the above copyright notice,
*        this list of conditions and the following disclaimer.
*  
*     * Redistributions in binary form must reproduce the above copyright notice,
*        this list of conditions and the following disclaimer in the documentation
*        and/or other materials provided with the distribution.
*  
*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
*  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
*  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
*  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
*  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
*  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
*  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*********************************************************************************/



#include <stdint.h> // uint64_t

#ifndef CALLBACK_H
#define CALLBACK_H

namespace SST { namespace MacSim {

template <typename ReturnT, typename... Params>
class CallbackBase {
  public:
    virtual ~CallbackBase() = 0;
    virtual ReturnT operator()(Params...) = 0;
};

template <typename ReturnT, typename... Params>
CallbackBase<ReturnT, Params...>::~CallbackBase() {}

template <typename ConsumerT, typename ReturnT, typename... Params>
class Callback : public CallbackBase<ReturnT, Params...> {
  private:
    typedef ReturnT (ConsumerT::*PtrMember)(Params...);

  public:
    Callback(ConsumerT* const object, PtrMember member) : object(object), member(member) {}
    Callback(const Callback<ConsumerT, ReturnT, Params...>& e) : object(e.object), member(e.member) {}
    ReturnT operator()(Params... params) {
      return (const_cast<ConsumerT*>(object)->*member)(params...);
    }

  private:
    ConsumerT* const object;
    const PtrMember member;
};

}}

#endif
